Conditions for Setting the DTC

• No disabling faults present.
• Engine is running.
• Soaktime is 480 minutes or greater.
• Intake air temperature (IAT) is stored on previous trip.

(Skewed Low Test) 

• Startup coolant temperature is higher than -20 °C (-4 °F).
• Vehicle speed is higher than 40km/h.
• Airflow is greater than 15g/sec.
• Difference between startup ECT and startup IAT is greater than 20 °C (68 °F).

(Skewed High Test) 

• Vehicle speed is higher than 40 km/h.
• Airflow is greater than 15 g/sec.
• Intake air temperature (IAT) is higher than threshold based on startup coolant temperature.